Sash lock



July 18, 1944.` M. L. DiLKs `2,353,953

sAsH LcK Filed Feb. 11, 1943 J/wafzzm Patented July 18, 1944 UNITED STATES PATENT OFFICE SASH LOCK Melvern L. Dilks, Llanerch, Pa.

Application February 11, 1943, Serial No. 475,487

2 Claims.

The invention relates to improvements in sash locks for windows. The object is to provide improved means for preventing a rattling or a movement of the sash within the frame after the desired adjustment of the same.

The invention comprises simple and emcient method and means for assembling the device and s-imple and eiiicient method and means for mounting the same upon the sash.

The device is adapted for association with a1- most any form of sash and frame.

Referring to the drawing, which illustrates by way of example suitable means for the embodiment of my invention:

Fig. 1 is a front elevation showing the device in locking position upon the sash.

Fig. 2 is a horizontal section on line 2-2 of Fig. 1.

Fig. 3 is a perspective view of the wedging element.

Fig. 41s a perspective View showing the method of assembling.

Fig. 5 is a view similar to Fig. 2, but showing a part of formation 'I oountersunk in said sash.

Similar numerals refer to similar parts throughout the several views.

Formation 'I, of a strip of resilient metal is so bent as to provide the two leaves I and II, normally in slightly convergent planes, but adapted to be wedged or spread apart, by the operation of the sliding wedge element 9.

The inner leaf I0 of formation 1 is adapted to be secured upon the face of the sash I2, adjacent the frame I3. This leaf I is provided with suitable holes for receiving the wood screws I and It, which secure the leaf I to the sash I2.

It will be noted, that Fig. .2 shows the outer end I'I of leaf II extending beyond the outer end I9 of leaf Ill, and while the major extension of leaf II is inclined to the plane of leaf Ill, its outer end II is formed so that the said end portion I'I will coincide with the plane of the underside of leaf ID.

This formation makes it possible to utilize the device with a frame and sash presenting a minimum of space between their adjacent surfaces.

As a further improvement in said device the said end or extension I'I may be slightly countersunk in the surface of the sash. This permits of a closer fit between sash and frame for receiving the end I'I of the leaf II.

A wedge element 9 is slidably mounted between the two leaves Il) and I I of element 1. This wedge is provided with a thumb-piece 2l for manipulating the same. Said wedge is also provided with a slot 22 which cooperates with the screw pin I6 for guiding the forward and backward movement of the wedge 9, to cause the separation of the free ends of leaves I0 and II and Vice versa, for locking and unlocking of the s-ash and frame.

This screw pin I6 also cooperates with screw I5 in securing the formation 'I to the sash I2.

An important advantage of the arrangement herein described, in addition to the simplicity and efficiency of the device, is that in the locking operation of the extension I'I upon the co-acting surface of the frame I3 the pressure is a simultaneous even right angular pressure, and not a sliding pressure, which would tend to cause abrasion or distortion.

In assembling and positioning the device, it will be noted that the formation 'I is properly positioned upon the sash and secured thereto by means of the screw I5. The thumb-piece 2l of wedge element 9 is introduced between the leaves I0 and lI and also through the longitudinal slot I4 provided in the leaf I (see Fig. 4). The thumb-piece 2| is then twisted to carry the wedge part 9 entirely between the two leaves Ill and II. A longitudinal slot I4 is also provided in the formation 1 for receiving the neck which joins the thumb-part. 'I'his slot serves to guide the movement of the wedge, and also cooperates with screw I6 in maintaining the position of the formation 1.

What I claim is:

1. A sash lock forv windows, comprising a resilient body bent to form two leaves, one overlying the other, and in slightly convergent planes, one leaf having an end extending beyond the other leaf-end and wedging means slidable longitudinally between said leaves for separating the same, the said leaf-end that extends beyond the other leaf-end being so shaped as to secure normally an extension in a plane co-existent with the plane of the other leaf-end.

2. A sash lock for windows, comprising a resilient body bent to form two leaves, one overlying the other, said leaves extending in slightly convergent planes, one leaf having an end extending beyond the other leaf-end, said extending end being the only part inserted between the sash and frame, and wedging means slidable longitudinally between said leaves for separating the same, the parts being so arranged and operated as to secure even and simultaneous pressure engagement throughout the respective coacting areas of the leaf-end and frame.

MELVERN L. DILKS. 

